Limited slip broke?

Kent94 · Jul 21, 2013

Hey guys, I have the 3:73 LS rear axle. Before I tuned and deleted I burned out a few times and it laid posi. Then I deleted and tuned and never really beat on the truck and never noticed that the limited slip wasn't kicking in till I left and strip and only the right tire went the left would not spin. Even stuck pulling a trailer it wont spin. But on a gravel road if I punch it both tires spin. I've read that the lockers in these trucks stock are garbage. Not sure if its broken or not. Bout to turn back to stock and bring in for warranty work. Just wondering if anyone else has had these issues.

RedRice589 · Jul 21, 2013

Just crack them loose first then it'll lock and you should be good.

Kent94 · Jul 21, 2013

RedRoce589 said:
Just crack them loose first then it'll lock and you should be good.

What do you mean? I had my 50hp tune on and let into it easy till the tire started to spin and the left would not catch. I forgot to mention I have traction control. I left it on and it just defuels and no power so I have to turn off not sure if that would affect it?

Super08Duty · Jul 21, 2013

When you see only 1 tire spinning, stop, brake boost and try again. This is what I do when my truck spins one tire. Your diff isn't broken.

Kent94 · Jul 21, 2013

Super08Duty said:
When you see only 1 tire spinning, stop, brake boost and try again. This is what I do when my truck spins one tire. Your diff isn't broken.

Why does it do that?

RedRice589 · Jul 21, 2013

To not break anything.

WoodBoy · Jul 21, 2013

Kent94 said:
Why does it do that?

Kent94 said:
Hey guys, I have the 3:73 LS rear axle. Before I tuned and deleted I burned out a few times and it laid posi. Then I deleted and tuned and never really beat on the truck and never noticed that the limited slip wasn't kicking in till I left and strip and only the right tire went the left would not spin. Even stuck pulling a trailer it wont spin. But on a gravel road if I punch it both tires spin. I've read that the lockers in these trucks stock are garbage. Not sure if its broken or not. Bout to turn back to stock and bring in for warranty work. Just wondering if anyone else has had these issues.

You already know

Super08Duty · Jul 22, 2013

They're not the best limit slip design. Then again, ford built these trucks to haul and tow. Not to spin the tires.

Kent94 · Jul 22, 2013

Tried today 1 tire off road 1 tire on an left tire would not hook tried a few different things to...

sootie · Jul 22, 2013

the clutches are worn out likely. just rebuild it.

...or do yourself a big favour and put a truetrac in it.

WoodBoy · Jul 22, 2013

Look into a Detroit truetrac

Kent94 · Jul 22, 2013

Ya I guess I will. P. I. T. A. Wen u can't go anywhere in 2wheel. I have warranty so Ill just bring it in see what they say

Super08Duty · Jul 22, 2013

You need a trutrac

fordman2121 · Jul 26, 2013

Like said above, don't waste your time on a factory unit. I rebuilt one and on high horsepower starts it still wont hold. Ill never rebuild the factory ls again.

sootie · Jul 26, 2013

fordman2121 said:
Like said above, don't waste your time on a factory unit. I rebuilt one and on high horsepower starts it still wont hold. Ill never rebuild the factory ls again.

ditto